Add S3 commands documentation for file storage (#52)

docs/services/files-storage/S3 commands.md

@@ -0,0 +1,24 @@
+# S3 commands
+
+Please find below a set of commands in order to configure, check, and upload a file to an S3 bucket from the command line :
+
+```
+# configure AWS
+aws configure
+AWS Access Key ID [None]: <S3_ACCESS_KEY>
+AWS Secret Access Key [None]: <S3_SECRET_KEY>
+Default region name [None]: <S3_REGION>
+Default output format [None]:
+
+# check S3 bucket for availability of file
+aws s3 ls s3://<S3_BUCKET_NAME> --endpoint-url <S3_ENDPOINT_URL> --recursive --human-readable --summarize | grep xlsx | grep sonne
+2023-05-05 16:54:00    9.4 KiB medienlbdvd_bio_genetischer_code_sonne/medienlbdvd_bio_genetischer_code_sonne.xlsx
+
+# upload file to S3 bucket
+aws s3 cp medienlbdvd_bio_genetischer_code_sonne.xlsx s3://<S3_BUCKET_NAME>/medienlbdvd_bio_genetischer_code_sonne/medienlbdvd_bio_genetischer_code_sonne.xlsx --endpoint-url <S3_ENDPOINT_URL>
+upload: ./medienlbdvd_bio_genetischer_code_sonne.xlsx to s3://<S3_BUCKET_NAME>/medienlbdvd_bio_genetischer_code_sonne/medienlbdvd_bio_genetischer_code_sonne.xlsx
+
+# re-check S3 bucket
+aws s3 ls s3://<S3_BUCKET_NAME> --endpoint-url <S3_ENDPOINT_URL> --recursive --human-readable --summarize | grep xlsx | grep sonne
+2025-02-27 13:30:57    9.5 KiB medienlbdvd_bio_genetischer_code_sonne/medienlbdvd_bio_genetischer_code_sonne.xlsx
+```