fix(ci): подключить тесты к базе в сети задания

.gitea/workflows/docker.yml

@@ -57,16 +57,31 @@ jobs:
         run: |
           set -euo pipefail
           NAME="mm-pg-${{ gitea.run_id }}-${{ gitea.run_attempt }}"
-          docker rm -f "$NAME" mm-pg 2>/dev/null || true
-          HOST_PORT=$(python3 -c 'import socket; s=socket.socket(); s.bind(("127.0.0.1", 0)); print(s.getsockname()[1]); s.close()')
+          docker rm -f "$NAME" 2>/dev/null || true
+          # Docker-backed Gitea runners execute this step in a separate container.
+          # Join its network; a published host loopback port is not reachable here.
+          NETWORKS=$(docker inspect --format '{{range $name, $network := .NetworkSettings.Networks}}{{println $name}}{{end}}' "$(cat /etc/hostname)" 2>/dev/null || true)
+          if [ -n "$NETWORKS" ]; then
+            test "$(printf '%s\n' "$NETWORKS" | wc -l)" -eq 1
+            NETWORK_ARGS=(--network "$NETWORKS" --network-alias "$NAME")
+            PG_HOST="$NAME"
+            PG_PORT=5432
+          else
+            # Host-based runners can use a Docker-assigned ephemeral host port.
+            NETWORK_ARGS=(-p 127.0.0.1::5432)
+            PG_HOST=127.0.0.1
+          fi
           docker run -d --name "$NAME" --rm \
             -e POSTGRES_USER=mmapp \
             -e POSTGRES_PASSWORD=mmapp \
             -e POSTGRES_DB=mmapp \
-            -p "127.0.0.1:${HOST_PORT}:5432" \
+            "${NETWORK_ARGS[@]}" \
             postgres:18-alpine
           echo "PG_CONTAINER=$NAME" >> "${GITHUB_ENV}"
-          echo "DATABASE_URL=postgres://mmapp:mmapp@127.0.0.1:${HOST_PORT}/mmapp" >> "${GITHUB_ENV}"
+          if [ "$PG_HOST" = 127.0.0.1 ]; then
+            PG_PORT=$(docker port "$NAME" 5432/tcp | awk -F: '{print $NF}')
+          fi
+          echo "DATABASE_URL=postgres://mmapp:mmapp@${PG_HOST}:${PG_PORT}/mmapp" >> "${GITHUB_ENV}"
           for i in $(seq 1 40); do
             if docker exec "$NAME" pg_isready -U mmapp -d mmapp; then
               exit 0
@@ -79,15 +94,27 @@ jobs:
 
       - name: Install and test backend
         shell: bash
+        env:
+          REQUIRE_TEST_POSTGRES: "1"
         run: |
           set -euo pipefail
           npm ci
+          node --input-type=module <<'NODE'
+          import pg from 'pg';
+          const pool = new pg.Pool({ connectionString: process.env.DATABASE_URL, connectionTimeoutMillis: 8000 });
+          try {
+            await pool.query('SELECT 1');
+            console.log('PostgreSQL reachable from the test process');
+          } finally {
+            await pool.end();
+          }
+          NODE
           npm run test --prefix backend
 
       - name: Stop PostgreSQL
         if: always()
         shell: bash
-        run: docker rm -f "${PG_CONTAINER:-}" mm-pg 2>/dev/null || true
+        run: docker rm -f "${PG_CONTAINER:-}" 2>/dev/null || true
 
   backend-image:
     needs: