Update Drone configuration and Dockerfile to use mirrorred images.

Expect pipeline to fail.

.drone.yml

@@ -5,27 +5,27 @@ name: build
 
 steps:
   - name: lint
-    image: golangci/golangci-lint:v1.43.0
+    image: code.pztrn.name/containers/mirror/golangci/golangci-lint:v1.46.2
     environment:
       CGO_ENABLED: 0
     commands:
       - golangci-lint run
 
   - name: test
-    image: golang:1.17.3-alpine
+    image: code.pztrn.name/containers/mirror/golang:1.18.3-alpine
     environment:
       CGO_ENABLED: 0
     commands:
       - go test ./...
 
   - name: docker
-    image: plugins/docker
+    image: code.pztrn.name/containers/mirror/plugins/docker:20.13.0
     when:
       branch: ["master"]
     settings:
-      username:
+      registry: code.pztrn.name
-        from_secret: dockerhub_user
+      username: drone
       password:
-        from_secret: dockerhub_password
+        from_secret: drone_secret
-      repo: pztrn/metricator
+      repo: code.pztrn.name/apps/metricator
       auto_tag: true

Dockerfile

@@ -1,4 +1,4 @@
-FROM registry.gitlab.pztrn.name/containers/mirror/golang:1.15.5-alpine AS build
+FROM code.pztrn.name/containers/mirror/golang:1.18.3-alpine AS build
 
 WORKDIR /go/src/gitlab.pztrn.name/pztrn/metricator
 COPY . .
@@ -13,7 +13,7 @@ RUN apk add bash git make
 RUN make metricatord-build
 RUN make metricator-client-build
 
-FROM registry.gitlab.pztrn.name/containers/mirror/golang:1.15.5-alpine
+FROM code.pztrn.name/containers/mirror/golang:1.18.3-alpine
 LABEL maintainer="Stanislav N. <pztrn@pztrn.name>"
 
 COPY --from=build /go/src/gitlab.pztrn.name/pztrn/metricator/._bin/metricatord /usr/local/bin/metricatord