fix(bridge): docker build (#747)

.dockerignore

@@ -0,0 +1,6 @@
+substrate-node
+activation-service
+clients/tfchain-client-rs
+clients/tfchain-client-js
+tools
+cli-tool

bridge/tfchain_bridge/Dockerfile

@@ -1,9 +1,18 @@
 FROM golang:alpine3.14 as BUILDER
-WORKDIR /opt/tfchain
-COPY . .
-WORKDIR /opt/tfchain
-RUN go build
+
+WORKDIR /src
+
+ADD bridge/tfchain_bridge /src/bridge/tfchain_bridge
+ADD clients/tfchain-client-go /src/clients/tfchain-client-go
+
+WORKDIR /src
+
+RUN cd /src/bridge/tfchain_bridge &&\
+    CGO_ENABLED=0 GOOS=linux go build -ldflags "-w -s -X main.GitCommit=${version} -extldflags '-static'"  -o tfchain_bridge &&\ 
+    chmod +x tfchain_bridge
 
 FROM alpine:3.13.5
-COPY --from=BUILDER /opt/tfchain/tfchain_bridge /bin/
+
+COPY --from=BUILDER /src/bridge/tfchain_bridge/tfchain_bridge /bin/
+
 ENTRYPOINT [ "/bin/tfchain_bridge" ]

bridge/tfchain_bridge/building.md

@@ -8,6 +8,9 @@ This is a normal go project so just execute `go build`.
 
 To build a docker image with the latest git tag as version:
 
+Note: this assumes you are in this directory (bridge/tfchain_bridge)
+
 ```sh
-docker build -t tftchainstellarbridge:$(git describe --abbrev=0 --tags | sed 's/^v//')  .
+cd ../../
+docker build -t tftchainstellarbridge:$(git describe --abbrev=0 --tags | sed 's/^v//')  . -f bridge/tfchain_bridge/Dockerfile
 ```