chore: wire oidc environment configuration

docker/edge.Dockerfile

@@ -6,6 +6,14 @@ COPY frontend/package.json frontend/package.json
 COPY backend/package.json backend/package.json
 RUN pnpm install --frozen-lockfile
 COPY frontend frontend
+
+ARG OIDC_ISSUER=https://idp.example.invalid/realms/travel-planner
+ARG OIDC_CLIENT_ID=travel-planner-web
+RUN sed -i \
+      -e "s#issuer: '.*',#issuer: '${OIDC_ISSUER}',#" \
+      -e "s#clientId: '.*',#clientId: '${OIDC_CLIENT_ID}',#" \
+      frontend/src/environments/environment.production.ts
+
 RUN pnpm --filter frontend build
 
 FROM nginx:1.29.8-alpine