Add HTTP gem for request proxying and enhance application layout

.devcontainer/docker-compose.yml

@@ -56,6 +56,11 @@ services:
       - GF_SERVER_HTTP_PORT=3100
       - GF_USERS_ALLOW_SIGN_UP=false
       - GF_LOG_LEVEL=debug
+      - GF_SERVER_ROOT_URL=http://localhost:3100/grafana/
+      - GF_SERVER_SERVE_FROM_SUB_PATH=false
+      - GF_AUTH_PROXY_ENABLED=true
+      - GF_AUTH_PROXY_HEADER_NAME=X-WEBAUTH-USER
+      - GF_AUTH_PROXY_HEADER_PROPERTY=username
     volumes:
       - devcontainer-redux-grafana-data:/var/lib/grafana