Add Google Cloud K3s infrastructure support

- Add Terraform configuration for GCP instance and storage
- Add startup script for K3s installation and configuration
- Add pipeline scripts for deployment and management
- Add Forgejo deployment manifests and configuration

gcloud/tf/scripts/pre-flight-checks.sh

@@ -0,0 +1,65 @@
+#!/usr/bin/env bash
+
+echo "🧪 checking we have tofu insatalled..."
+if ! command -v tofu &> /dev/null
+then
+    echo "❌ tofu could not be found, please install it first"
+    echo 
+    echo "see https://opentofu.org/docs/intro/install/standalone/"
+    echo 
+    echo "and https://opentofu.org/docs/intro/install/ for more details"
+    echo
+    exit 1
+fi  
+
+echo "✅ tofu is installed,..."
+echo 
+tofu version
+echo
+
+echo "🧪 checking we have gcloud insatalled..."
+if ! command -v gcloud &> /dev/null
+then
+    echo "❌ gcloud could not be found, please install it first"
+    echo
+    echo "see https://cloud.google.com/sdk/docs/install"
+    echo
+    exit 1
+fi
+
+echo "✅ gcloud is installed,..."
+echo
+gcloud version
+echo
+
+echo "🧪 checking we have kubectl insatalled..."
+if ! command -v kubectl &> /dev/null
+then
+    echo "❌ kubectl could not be found, please install it first"
+    echo
+    echo "see https://kubernetes.io/docs/tasks/tools/install-kubectl-linux/"
+    echo
+    exit 1
+fi
+
+echo "✅ kubectl is installed,..."
+echo
+kubectl version --client
+echo 
+
+echo "🧪 checking we have envsubst insatalled..."
+if ! command -v envsubst &> /dev/null
+then
+    echo "❌ envsubst could not be found, please install it first"
+    echo
+    echo "on ubuntu you can install it with: sudo apt-get install -y gettext-base"
+    echo
+    exit 1
+fi
+echo "✅ envsubst is installed,..."
+echo
+envsubst --version
+echo    
+
+echo "✅ Pre-flight checks passed. You are ready to proceed 🙂"
+echo