feat(docker): add build version to built images

Signed-off-by: Erik Michelson <github@erik.michelson.eu>

.github/workflows/docker.yml

@@ -46,3 +46,5 @@ jobs:
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
+          build-args: |
+            BUILD_VERSION=${{ github.event.head_commit.id }}

Dockerfile

@@ -4,11 +4,13 @@
 
 # BUILD
 FROM node:18-alpine AS builder
+ARG BUILD_VERSION=CLIENT_VERSION_MISSING
 ENV NEXT_TELEMETRY_DISABLED=1
 
 WORKDIR /app
 COPY . ./
 RUN yarn install --immutable && \
+    sed -i "s/CLIENT_VERSION_MISSING/${BUILD_VERSION}/" src/version.json && \
     yarn build:for-real-backend
 
 # RUNNER

src/version.json

@@ -1,5 +1,5 @@
 {
-  "version": "0.0",
+  "version": "CLIENT_VERSION_MISSING",
   "sourceCodeUrl": "https://github.com/hedgedoc/react-client",
   "issueTrackerUrl": "https://github.com/hedgedoc/react-client/issues"
 }