Add redis-server to devcontainer for local running of tests to pass (#37

)

Got tests to pass when running in devcontainer

These commands get around rc policy that prevents the redis server from starting. I also upgraded the image to 3.9 because the command does not work on python 3.8

.devcontainer/devcontainer.json

@@ -1,6 +1,7 @@
 {
   "name": "pallets-eco/flask-rq",
-  "image": "mcr.microsoft.com/devcontainers/python:3.8",
+  "image": "mcr.microsoft.com/devcontainers/python:3.9",
+  "remoteUser": "root",
   "customizations": {
     "vscode": {
       "settings": {

.devcontainer/on-create-command.sh

@@ -1,4 +1,6 @@
 #!/bin/bash
+printf '#!/bin/sh\nexit 0' > /usr/sbin/policy-rc.d
+sudo apt-get update && sudo apt-get install -y redis-server
 set -e
 python3 -m venv --upgrade-deps .venv
 . .venv/bin/activate