diff --git a/.dockerignore b/.dockerignore
index 4281df9627..f514654911 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -5,7 +5,6 @@ back/node_modules
 front/node_modules
 
 nginx/etc/letsencrypt
-front/env-config.js
 front/dist
 front/dist-ssr
 .env
diff --git a/Dockerfile.front b/Dockerfile.front
index ac36771956..f9f719dcb4 100644
--- a/Dockerfile.front
+++ b/Dockerfile.front
@@ -6,5 +6,4 @@ COPY ./front/ /app/front
 COPY ./back/src/shared /app/back/src/shared
 RUN npm run copy-shared
 RUN npm run build-with-shared-as-is
-RUN npm run prod-env-config
 CMD npm run serve -- --host 0.0.0.0
diff --git a/back/src/__tests__/e2e/addFormEstablishment.e2e.test.ts b/back/src/__tests__/e2e/addFormEstablishment.e2e.test.ts
index f97479ad98..7cdb039873 100644
--- a/back/src/__tests__/e2e/addFormEstablishment.e2e.test.ts
+++ b/back/src/__tests__/e2e/addFormEstablishment.e2e.test.ts
@@ -32,9 +32,7 @@ describe("Route to post addEstablishmentFormRouteWithoutApiKey", () => {
       it("forbids access to route if no api consumer", async () => {
         const { request } = await buildTestApp();
 
-        const response = await request
-          .post(`/immersion-offers`)
-          .send({});
+        const response = await request.post(`/immersion-offers`).send({});
 
         expect(response.status).toBe(403);
       });
diff --git a/front/.dockerignore b/front/.dockerignore
index a1d85a0b5b..f4f9f437c9 100644
--- a/front/.dockerignore
+++ b/front/.dockerignore
@@ -1,5 +1,4 @@
 node_modules
-env-config.js
 .DS_Store
 dist
 dist-ssr
diff --git a/front/.env b/front/.env
deleted file mode 100644
index e1402734b8..0000000000
--- a/front/.env
+++ /dev/null
@@ -1 +0,0 @@
-GATEWAY=IN_MEMORY
diff --git a/front/.env.sample b/front/.env.sample
deleted file mode 100644
index 14b4931ea2..0000000000
--- a/front/.env.sample
+++ /dev/null
@@ -1,5 +0,0 @@
-# .env file is used in a script and can NOT hold any comments
-# This file provides explaination and options
-# The values that are provided in `.env` file are the default values, the values can be changed at runtime
-
-GATEWAY=IN_MEMORY # options: IN_MEMORY | HTTP
diff --git a/front/.gitignore b/front/.gitignore
index b8d35bf7ce..724e0e3964 100644
--- a/front/.gitignore
+++ b/front/.gitignore
@@ -5,5 +5,3 @@ dist-ssr
 *.local
 .idea
 src/shared
-env-config.js
-!.env
\ No newline at end of file
diff --git a/front/env.sh b/front/env.sh
deleted file mode 100755
index 6c74eb096d..0000000000
--- a/front/env.sh
+++ /dev/null
@@ -1,31 +0,0 @@
-#!/bin/bash
-# This script is from:  https://www.freecodecamp.org/news/how-to-implement-runtime-environment-variables-with-create-react-app-docker-and-nginx-7f9d42a91d70/
-# It is used to generate env-config.js. We need it to be able to use env variable at runtime (see link on previous line)
-
-# Recreate config file
-rm -rf ./env-config.js
-touch ./env-config.js
-
-# Add assignment
-echo "window._env_ = {" >> ./env-config.js
-
-# Read each line in .env file
-# Each line represents key=value pairs
-while read -r line || [[ -n "$line" ]];
-do
-  # Split env variables by the first character `=`
-  if printf '%s\n' "$line" | grep -q -e '='; then
-    varname=$(printf '%s\n' "$line" | sed -e 's/=.*//')
-    varvalue=$(printf '%s\n' "$line" | sed -e 's/^[^=]*=//')
-  fi
-
-  # Read value of current variable if exists as Environment variable
-  value=$(printf '%s\n' "${!varname}")
-  # Otherwise use value from .env file
-  [[ -z $value ]] && value=${varvalue}
-
-  # Append configuration property to JS file
-  echo "  $varname: \"$value\"," >> ./env-config.js
-done < .env
-
-echo "}" >> ./env-config.js
diff --git a/front/package.json b/front/package.json
index f7fc19afa4..2fe9b1cc26 100644
--- a/front/package.json
+++ b/front/package.json
@@ -2,16 +2,14 @@
   "version": "0.0.0",
   "scripts": {
     "test": "npm run symlink-or-copy-shared && jest --passWithNoTests",
-    "dev": "npm run symlink-shared && npm run gen-env-config && vite",
-    "dev-http": "npm run symlink-shared && GATEWAY=HTTP npm run gen-env-config && vite",
+    "dev": "npm run symlink-shared && VITE_GATEWAY=IN_MEMORY vite",
+    "dev-http": "npm run symlink-shared && vite",
     "build": "npm run symlink-or-copy-shared && vite build",
     "build-with-shared-as-is": "vite build",
-    "serve": "npm run prod-env-config && vite preview",
+    "serve": "vite preview",
     "typecheck": "tsc --noEmit",
     "includecheck": "./check_includes.sh",
     "format": "prettier --write src",
-    "gen-env-config": "chmod +x ./env.sh && ./env.sh",
-    "prod-env-config": "npm run gen-env-config && cp env-config.js dist/env-config.js",
     "format:check": "prettier --check src",
     "fullcheck": "npm run includecheck && npm run format && npm run test && npm run typecheck",
     "symlink-or-copy-shared": "if [ ! -z $CI ]; then npm run copy-shared; else npm run symlink-shared; fi;",
diff --git a/front/src/app/dependencies.ts b/front/src/app/dependencies.ts
index 4bf9a962e4..cfa1a7d09d 100644
--- a/front/src/app/dependencies.ts
+++ b/front/src/app/dependencies.ts
@@ -22,36 +22,36 @@ import { RomeAutocompleteGateway } from "src/core-logic/ports/RomeAutocompleteGa
 import { ENV } from "src/environmentVariables";
 
 export const formEstablishmentGateway: FormEstablishmentGateway =
-  ENV.gateway === "HTTP"
-    ? new HttpFormEstablishmentGateway()
-    : new InMemoryFormEstablishmentGateway(["12345678901238"]);
+  ENV.gateway === "IN_MEMORY"
+    ? new InMemoryFormEstablishmentGateway(["12345678901238"])
+    : new HttpFormEstablishmentGateway();
 
 export const immersionApplicationGateway: ImmersionApplicationGateway =
-  ENV.gateway === "HTTP"
-    ? new HttpImmersionApplicationGateway()
-    : new InMemoryImmersionApplicationGateway();
+  ENV.gateway === "IN_MEMORY"
+    ? new InMemoryImmersionApplicationGateway()
+    : new HttpImmersionApplicationGateway();
 
 export const immersionSearchGateway: ImmersionSearchGateway =
-  ENV.gateway === "HTTP"
-    ? new HttpImmersionSearchGateway()
-    : new InMemoryImmersionSearchGateway();
+  ENV.gateway === "IN_MEMORY"
+    ? new InMemoryImmersionSearchGateway()
+    : new HttpImmersionSearchGateway();
 
 export const apiAdresseGateway: ApiAdresseGateway =
-  ENV.gateway === "HTTP"
-    ? new HttpApiAdresseGateway()
-    : new InMemoryApiAdresseGateway();
+  ENV.gateway === "IN_MEMORY"
+    ? new InMemoryApiAdresseGateway()
+    : new HttpApiAdresseGateway();
 
 export const featureFlagsGateway: FeatureFlagsGateway =
-  ENV.gateway === "HTTP"
-    ? new HttpFeatureFlagGateway()
-    : new InMemoryFeatureFlagGateway();
+  ENV.gateway === "IN_MEMORY"
+    ? new InMemoryFeatureFlagGateway()
+    : new HttpFeatureFlagGateway();
 
 export const agencyGateway: AgencyGateway =
-  ENV.gateway === "HTTP"
-    ? new HttpAgencyGateway()
-    : new InMemoryAgencyGateway();
+  ENV.gateway === "IN_MEMORY"
+    ? new InMemoryAgencyGateway()
+    : new HttpAgencyGateway();
 
 export const romeAutocompleteGateway: RomeAutocompleteGateway =
-  ENV.gateway === "HTTP"
-    ? new HttpRomeAutocompleteGateway()
-    : new InMemoryRomeAutocompleteGateway();
+  ENV.gateway === "IN_MEMORY"
+    ? new InMemoryRomeAutocompleteGateway()
+    : new HttpRomeAutocompleteGateway();
diff --git a/front/src/environmentVariables.ts b/front/src/environmentVariables.ts
index 3911caea9f..15a50aa9d3 100644
--- a/front/src/environmentVariables.ts
+++ b/front/src/environmentVariables.ts
@@ -1,12 +1,7 @@
-import { throwIfNotInArray } from "src/shared/envHelpers";
+const gateway =
+  import.meta.env.VITE_GATEWAY === "IN_MEMORY" ? "IN_MEMORY" : "HTTP";
 
-const windowEnv = (window as any)._env_;
-
-const gateway = throwIfNotInArray({
-  processEnv: windowEnv,
-  authorizedValues: ["HTTP", "IN_MEMORY"],
-  variableName: "GATEWAY",
-});
+console.info("Gateway is : ", gateway);
 
 export const ENV = {
   dev: import.meta.env.DEV,