feat: add .env.template and update README with requirements and setup instructions

.env.template

@@ -0,0 +1,2 @@
+export KEEPASS_DATABASE_FILE="$HOME/cloud.mint-system.ch/Mint System/Data/Infrastruktur.kdbx"
+export KEEPASS_DATABASE_KEY_FILE="$HOME/cloud.mint-system.ch/Mint System/Secrets/KeePass.key"

README.md

@@ -16,6 +16,13 @@ The Mint System collection of Helm charts.
 * 🏗️ **Build**: Fork and build your own Helm charts.
 * 🚀 **Deploy**: Configure and deploy Helm charts to remote clusters.
 
+## Requirements
+
+* Install [yq](https://mikefarah.gitbook.io/yq/#install)
+* Install [kubectl](https://kubernetes.io/docs/tasks/tools/#kubectl)
+* bash/zsh alias `task='./task'` with optional [completion](https://taskfile.build/#completion)
+
+
 ## Usage
 
 You can use this project as any other Helm chart repository.