fix(ci): smoke-test the image from inside its own container via docker exec

The smoke test probed the server over the network, which fails on the
self-hosted runner: the job step runs in a container that shares the host
Docker socket but sits on a different network, so it can reach neither a
published host port (-p lands on the runner host) nor the server
container's bridge IP (different network → curl connect hangs, so the job
looked stuck rather than failing).

Probe from inside the server container with `docker exec` instead: it goes
through the Docker socket and runs in the server's own netns, where
127.0.0.1:8080 always works regardless of runner topology. The image ships
python + httpx, so no curl or extra image pull is needed. Drop the now
unnecessary -p publish.

.gitea/workflows/docker.yml

@@ -74,28 +74,38 @@ jobs:
           echo "container uid: $uid"
           [ "$uid" = "1000" ] || { echo "::error::image runs as uid $uid, expected 1000"; exit 1; }
 
-          # 2. Boot the server and probe it over HTTP.
+          # 2. Boot the server and probe it from *inside* its own container via
-          docker run -d --name familiar-smoke -e FAMILIAR_HTTP_TOKEN="$TOKEN" -p 18080:8080 "$IMG"
+          # `docker exec`. On self-hosted runners the job step runs in a container
+          # that shares the host's Docker socket but sits on a different network,
+          # so it can reach neither a published host port (-p lands on the runner
+          # host, not this step's netns) nor the server container's bridge IP
+          # (different network → connect hangs). `docker exec` goes through the
+          # socket and runs the probe in the server's own netns, where
+          # 127.0.0.1:8080 always works regardless of runner topology. The image
+          # ships python + httpx, so no curl or extra pull is needed.
+          docker run -d --name familiar-smoke -e FAMILIAR_HTTP_TOKEN="$TOKEN" "$IMG"
+
+          # probe "<httpx call returning a Response>" -> prints the status code
+          probe() { docker exec familiar-smoke python -c "import httpx; print(($1).status_code)"; }
+
           for i in $(seq 1 30); do
-            if curl -fsS "http://127.0.0.1:18080/healthz" >/dev/null 2>&1; then break; fi
+            if docker exec familiar-smoke python -c \
+              "import httpx; httpx.get('http://127.0.0.1:8080/healthz', timeout=5)" >/dev/null 2>&1; then
+              break
+            fi
             sleep 1
           done
 
           echo "== /healthz (expect 200) =="
-          code=$(curl -s -o /dev/null -w '%{http_code}' "http://127.0.0.1:18080/healthz")
+          code=$(probe "httpx.get('http://127.0.0.1:8080/healthz', timeout=10)")
           [ "$code" = "200" ] || { echo "::error::/healthz returned $code"; docker logs familiar-smoke; exit 1; }
 
           echo "== MCP without token (expect 401) =="
-          code=$(curl -s -o /dev/null -w '%{http_code}' -X POST "http://127.0.0.1:18080/mcp" \
+          code=$(probe "httpx.post('http://127.0.0.1:8080/mcp', timeout=10, headers={'Accept':'application/json, text/event-stream','Content-Type':'application/json'}, json={'jsonrpc':'2.0','id':1,'method':'initialize','params':{}})")
-            -H 'Accept: application/json, text/event-stream' -H 'Content-Type: application/json' \
-            -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{}}')
           [ "$code" = "401" ] || { echo "::error::unauthenticated MCP returned $code"; exit 1; }
 
           echo "== MCP with valid token (expect 200) =="
-          code=$(curl -s -o /dev/null -w '%{http_code}' -X POST "http://127.0.0.1:18080/mcp" \
+          code=$(probe "httpx.post('http://127.0.0.1:8080/mcp', timeout=10, headers={'Authorization':'Bearer $TOKEN','Accept':'application/json, text/event-stream','Content-Type':'application/json'}, json={'jsonrpc':'2.0','id':1,'method':'initialize','params':{'protocolVersion':'2025-06-18','capabilities':{},'clientInfo':{'name':'ci','version':'1'}}})")
-            -H "Authorization: Bearer $TOKEN" \
-            -H 'Accept: application/json, text/event-stream' -H 'Content-Type: application/json' \
-            -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2025-06-18","capabilities":{},"clientInfo":{"name":"ci","version":"1"}}}')
           [ "$code" = "200" ] || { echo "::error::authenticated MCP returned $code"; docker logs familiar-smoke; exit 1; }
 
           echo "Image smoke-test passed."