chore: default to port 8000

Dockerfile

@@ -74,11 +74,11 @@ COPY --from=builder /usr/local/bin/pokedex-api /usr/local/bin/pokedex-api
 
 ARG GIT_SHA=unknown
 ENV GIT_SHA=$GIT_SHA \
-    BIND_ADDR=0.0.0.0:5000
+    BIND_ADDR=0.0.0.0:8000
 
-EXPOSE 5000
+EXPOSE 8000
 USER app
 HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
-    CMD curl -fsS http://127.0.0.1:5000/health || exit 1
+    CMD curl -fsS http://127.0.0.1:8000/health || exit 1
 
 CMD ["pokedex-api"]