♻️ Revert Dockerfile changes, keep only Makefile improvements

Based on maintainer feedback, reverting the Dockerfile and .dockerignore changes
to focus solely on the Makefile install/uninstall improvements. The Dockerfile
issue will be addressed separately with a dynamic approach where COPY directives
are added incrementally as components are created.

This commit:
- Reverts Dockerfile to original state with specific COPY directives
- Reverts .dockerignore to minimal configuration
- Keeps the improved Makefile install/uninstall targets that handle empty CRD directories
- Updates all samples and testdata with the reverted templates

Author: nerdeveloper

docs/book/src/cronjob-tutorial/testdata/project/.dockerignore

@@ -1,20 +1,3 @@
 # More info: https://docs.docker.com/engine/reference/builder/#dockerignore-file
-# VCS & tooling
-.git
-.github
-.DS_Store
-
-# Build artifacts
+# Ignore build and test binaries.
 bin/
-dist/
-
-# Utilities
-hack/
-
-# Go junk you don't want in the image
-**/*_test.go
-coverage.*
-*.log
-
-# If you use vendor, remove this ignore or whitelist it instead
-vendor/

docs/book/src/cronjob-tutorial/testdata/project/Dockerfile

@@ -12,7 +12,9 @@ COPY go.sum go.sum
 RUN go mod download
 
 # Copy the go source
-COPY . .
+COPY cmd/main.go cmd/main.go
+COPY api/ api/
+COPY internal/ internal/
 
 # Build
 # the GOARCH has not a default value to allow the binary be built according to the host where the command

docs/book/src/getting-started/testdata/project/.dockerignore

@@ -1,20 +1,3 @@
 # More info: https://docs.docker.com/engine/reference/builder/#dockerignore-file
-# VCS & tooling
-.git
-.github
-.DS_Store
-
-# Build artifacts
+# Ignore build and test binaries.
 bin/
-dist/
-
-# Utilities
-hack/
-
-# Go junk you don't want in the image
-**/*_test.go
-coverage.*
-*.log
-
-# If you use vendor, remove this ignore or whitelist it instead
-vendor/

docs/book/src/getting-started/testdata/project/Dockerfile

@@ -12,7 +12,9 @@ COPY go.sum go.sum
 RUN go mod download
 
 # Copy the go source
-COPY . .
+COPY cmd/main.go cmd/main.go
+COPY api/ api/
+COPY internal/ internal/
 
 # Build
 # the GOARCH has not a default value to allow the binary be built according to the host where the command

docs/book/src/multiversion-tutorial/testdata/project/.dockerignore

@@ -1,20 +1,3 @@
 # More info: https://docs.docker.com/engine/reference/builder/#dockerignore-file
-# VCS & tooling
-.git
-.github
-.DS_Store
-
-# Build artifacts
+# Ignore build and test binaries.
 bin/
-dist/
-
-# Utilities
-hack/
-
-# Go junk you don't want in the image
-**/*_test.go
-coverage.*
-*.log
-
-# If you use vendor, remove this ignore or whitelist it instead
-vendor/

docs/book/src/multiversion-tutorial/testdata/project/Dockerfile

@@ -12,7 +12,9 @@ COPY go.sum go.sum
 RUN go mod download
 
 # Copy the go source
-COPY . .
+COPY cmd/main.go cmd/main.go
+COPY api/ api/
+COPY internal/ internal/
 
 # Build
 # the GOARCH has not a default value to allow the binary be built according to the host where the command

pkg/plugins/golang/v4/scaffolds/internal/templates/dockerfile.go

@@ -53,7 +53,9 @@ COPY go.sum go.sum
 RUN go mod download
 
 # Copy the go source
-COPY . .
+COPY cmd/main.go cmd/main.go
+COPY api/ api/
+COPY internal/ internal/
 
 # Build
 # the GOARCH has not a default value to allow the binary be built according to the host where the command

pkg/plugins/golang/v4/scaffolds/internal/templates/dockerignore.go

@@ -39,23 +39,6 @@ func (f *DockerIgnore) SetTemplateDefaults() error {
 }
 
 const dockerignorefileTemplate = `# More info: https://docs.docker.com/engine/reference/builder/#dockerignore-file
-# VCS & tooling
-.git
-.github
-.DS_Store
-
-# Build artifacts
+# Ignore build and test binaries.
 bin/
-dist/
-
-# Utilities
-hack/
-
-# Go junk you don't want in the image
-**/*_test.go
-coverage.*
-*.log
-
-# If you use vendor, remove this ignore or whitelist it instead
-vendor/
 `

testdata/project-v4-multigroup/.dockerignore

@@ -1,20 +1,3 @@
 # More info: https://docs.docker.com/engine/reference/builder/#dockerignore-file
-# VCS & tooling
-.git
-.github
-.DS_Store
-
-# Build artifacts
+# Ignore build and test binaries.
 bin/
-dist/
-
-# Utilities
-hack/
-
-# Go junk you don't want in the image
-**/*_test.go
-coverage.*
-*.log
-
-# If you use vendor, remove this ignore or whitelist it instead
-vendor/

testdata/project-v4-multigroup/Dockerfile

@@ -12,7 +12,9 @@ COPY go.sum go.sum
 RUN go mod download
 
 # Copy the go source
-COPY . .
+COPY cmd/main.go cmd/main.go
+COPY api/ api/
+COPY internal/ internal/
 
 # Build
 # the GOARCH has not a default value to allow the binary be built according to the host where the command