Update docker setup

.dockerignore

@@ -0,0 +1,3 @@
+.git
+
+config.json

.github/workflows/docker-image.yml

@@ -4,13 +4,9 @@ on:
   push:
     branches: [ "main" ]
     tags: 'v*'
-  pull_request:
-    branches: [ "main" ]
 
 jobs:
-
-  build:
-
+  build-and-publish:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout

Dockerfile

@@ -1,7 +1,19 @@
 # See https://hub.docker.com/r/denoland/deno/tags for available images
 FROM denoland/deno:alpine-1.36.1
 
-COPY . /opt/drand-bot
-WORKDIR /opt/drand-bot
+WORKDIR /app
+
+# Prefer not to run as root.
+USER deno
+
+# Cache the dependencies as a layer (the following two steps are re-run only when deps.ts is modified).
+# Ideally cache deps.ts will download and compile _all_ external files used in main.ts.
+COPY deps.ts .
+RUN deno cache deps.ts
+
+COPY . .
+
+# Compile the main app so that it doesn't need to be compiled each startup/entry.
+RUN deno cache main.ts
 
 CMD deno run --allow-read --allow-net --allow-env main.ts

README.md

@@ -104,6 +104,6 @@ Start:
 
 ```sh
 docker run \
-  -v $PWD/config.json:/opt/drand-bot/config.json \
+  -v "$PWD/config.json":/app/config.json \
   noislabs/nois-bot:nextgen
 ```