Simplify runtime checks and MCP smokes

docker/docs/entrypoint.sh

@@ -15,6 +15,12 @@ sources_file="${DOCS_MCP_SOURCES_FILE:-/etc/context-kit/docs-sources.txt}"
 local_sources_dir="${DOCS_MCP_LOCAL_SOURCES_DIR:-/etc/context-kit/local-sources}"
 local_sources_port="${DOCS_MCP_LOCAL_SOURCES_PORT:-8769}"
 
+if [ ! -f "$sources_file" ]; then
+  echo "docs-mcp: sources file missing: $sources_file" >&2
+  echo "docs-mcp: run bin/context-kit start to generate it, or mount a file at that path." >&2
+  exit 64
+fi
+
 if [ ! -r "$sources_file" ]; then
   echo "docs-mcp: sources file not readable: $sources_file" >&2
   echo "docs-mcp: set DOCS_MCP_SOURCES_FILE or mount one at that path." >&2

docker/web-search/Dockerfile

@@ -24,9 +24,13 @@ RUN npm install -g "@zhafron/mcp-web-search@${MCP_WEB_SEARCH_VERSION}" \
 
 ENV CHROME_PATH=/usr/bin/chromium \
   DEFAULT_SEARCH_PROVIDER=searxng \
+  HOME=/tmp \
   HTTP_TIMEOUT=15000 \
   MAX_BYTES=${MCP_WEB_SEARCH_MAX_BYTES} \
   MAX_RESULTS=10 \
-  SEARXNG_URL=http://searxng:8080
+  SEARXNG_URL=http://searxng:8080 \
+  XDG_CACHE_HOME=/tmp/.cache
+
+USER node
 
 ENTRYPOINT ["mcp-web-search"]