Move the gateway to junior.gib: CI deploy, compose copy, renewal script, docs

gateway/Containerfile

@@ -9,7 +9,7 @@ WORKDIR /app
 COPY package.json tsconfig.json ./
 COPY src ./src
 
-# `wristcode <command>` for operators: docker exec -it wristcode-gateway wristcode pair
+# `wristcode <command>` for operators: podman exec -it wristcode-gateway wristcode pair
 RUN printf '#!/bin/sh\nexec bun /app/src/cli.ts "$@"\n' > /usr/local/bin/wristcode \
     && chmod +x /usr/local/bin/wristcode \
     && mkdir -p /data && chown bun:bun /data

gateway/src/cli.ts

@@ -1,6 +1,6 @@
 #!/usr/bin/env bun
 // Operator commands. They edit the same SQLite file the running gateway reads, so changes apply
-// within a few seconds. In the container: `docker exec -it wristcode-gateway wristcode <command>`.
+// within a few seconds. In the container: `podman exec -it wristcode-gateway wristcode <command>`.
 
 import { loadConfig } from "./config.ts";
 import { openDb } from "./db.ts";