ci: fix warm-proxy variable expansion (use $VAR not ${VAR} for shell vars)

.drone.yml

@@ -12,21 +12,32 @@ trigger:
     - pull_request
 
 environment:
-  GOPRIVATE: git.beatrice.wtf/panic.haus/*
-  GONOSUMDB: git.beatrice.wtf/panic.haus/*
+  GOPROXY: https://git.beatrice.wtf/api/packages/panic.haus/go,https://proxy.golang.org,direct
+  GONOSUMDB: git.beatrice.wtf
+  GONOSUMCHECK: git.beatrice.wtf
 
 steps:
   - name: test
     image: golang:1.26
+    volumes:
+      - name: go-mod-cache
+        path: /go/pkg/mod
     commands:
       - go mod download
       - go test ./... -count=1
 
   - name: build
     image: golang:1.26
+    volumes:
+      - name: go-mod-cache
+        path: /go/pkg/mod
     commands:
       - go build ./...
 
+volumes:
+  - name: go-mod-cache
+    temp: {}
+
 ---
 kind: pipeline
 type: docker
@@ -39,22 +50,36 @@ trigger:
     - refs/tags/v*
 
 environment:
-  GOPRIVATE: git.beatrice.wtf/panic.haus/*
-  GONOSUMDB: git.beatrice.wtf/panic.haus/*
+  GOPROXY: https://git.beatrice.wtf/api/packages/panic.haus/go,https://proxy.golang.org,direct
+  GONOSUMDB: git.beatrice.wtf
+  GONOSUMCHECK: git.beatrice.wtf
 
 steps:
   - name: test
     image: golang:1.26
+    volumes:
+      - name: go-mod-cache
+        path: /go/pkg/mod
     commands:
       - go mod download
       - go test ./... -count=1
 
   - name: build
     image: golang:1.26
+    volumes:
+      - name: go-mod-cache
+        path: /go/pkg/mod
     commands:
       - go build ./...
 
   - name: warm-proxy
     image: golang:1.26
     commands:
-      - go list -m git.beatrice.wtf/panic.haus/go-auth@${DRONE_TAG}
+      - MODULE=$(go list -m)
+      - echo "Warming proxy for $MODULE@${DRONE_TAG}"
+      - curl -sf "https://git.beatrice.wtf/api/packages/panic.haus/go/$MODULE/@v/${DRONE_TAG}.info"
+      - echo "Registered $MODULE@${DRONE_TAG} in Gitea package registry"
+
+volumes:
+  - name: go-mod-cache
+    temp: {}