Update Go starter template to version 1.24

- Migrate Go starter template from version 1.22 to 1.24
- Rename `app/server.go` to `app/main.go` in multiple locations
- Update Dockerfiles and configuration files to support Go 1.24
- Adjust README and explanation files to reflect new Go version and file structure

Author: andy1li

compiled_starters/go/README.md

@@ -16,7 +16,7 @@ and more.
 
 # Passing the first stage
 
-The entry point for your HTTP server implementation is in `app/server.go`. Study
+The entry point for your HTTP server implementation is in `app/main.go`. Study
 and uncomment the relevant code, and push your changes to pass the first stage:
 
 ```sh
@@ -30,8 +30,8 @@ Time to move on to the next stage!
 
 Note: This section is for stages 2 and beyond.
 
-1. Ensure you have `go (1.19)` installed locally
+1. Ensure you have `go (1.24)` installed locally
 1. Run `./your_program.sh` to run your program, which is implemented in
-   `app/server.go`.
+   `app/main.go`.
 1. Commit your changes and run `git push origin master` to submit your solution
    to CodeCrafters. Test output will be streamed to your terminal.

compiled_starters/go/app/server.go renamed to compiled_starters/go/app/main.go

@@ -7,5 +7,5 @@ debug: false
 # Use this to change the Go version used to run your code
 # on Codecrafters.
 #
-# Available versions: go-1.22
-language_pack: go-1.22
+# Available versions: go-1.24
+language_pack: go-1.24

compiled_starters/go/codecrafters.yml

@@ -8,4 +8,4 @@
 
 module github.com/codecrafters-io/http-server-starter-go
 
-go 1.22
+go 1.24.0

compiled_starters/go/go.mod

@@ -1,13 +1,16 @@
+# syntax=docker/dockerfile:1.7-labs
 FROM golang:1.22-alpine
 
+# Ensures the container is re-built if go.mod or go.sum changes
 ENV CODECRAFTERS_DEPENDENCY_FILE_PATHS="go.mod,go.sum"
 
 WORKDIR /app
 
-COPY go.mod go.sum ./
+# .git & README.md are unique per-repository. We ignore them on first copy to prevent cache misses
+COPY --exclude=.git --exclude=README.md . /app
 
-# Starting from Go 1.20, the go standard library is no loger compiled
-# setting the GODEBUG environment to "installgoroot=all" restores the old behavior
+# Starting from Go 1.20, the go standard library is no loger compiled.
+# Setting GODEBUG to "installgoroot=all" restores the old behavior
 RUN GODEBUG="installgoroot=all" go install std
 
 RUN go mod download

dockerfiles/go-1.22.Dockerfile

@@ -0,0 +1,16 @@
+# syntax=docker/dockerfile:1.7-labs
+FROM golang:1.24-alpine
+
+# Ensures the container is re-built if go.mod or go.sum changes
+ENV CODECRAFTERS_DEPENDENCY_FILE_PATHS="go.mod,go.sum"
+
+WORKDIR /app
+
+# .git & README.md are unique per-repository. We ignore them on first copy to prevent cache misses
+COPY --exclude=.git --exclude=README.md . /app
+
+# Starting from Go 1.20, the go standard library is no loger compiled.
+# Setting GODEBUG to "installgoroot=all" restores the old behavior
+RUN GODEBUG="installgoroot=all" go install std
+
+RUN go mod download

dockerfiles/go-1.24.Dockerfile

@@ -16,7 +16,7 @@ and more.
 
 # Passing the first stage
 
-The entry point for your HTTP server implementation is in `app/server.go`. Study
+The entry point for your HTTP server implementation is in `app/main.go`. Study
 and uncomment the relevant code, and push your changes to pass the first stage:
 
 ```sh
@@ -30,8 +30,8 @@ Time to move on to the next stage!
 
 Note: This section is for stages 2 and beyond.
 
-1. Ensure you have `go (1.19)` installed locally
+1. Ensure you have `go (1.24)` installed locally
 1. Run `./your_program.sh` to run your program, which is implemented in
-   `app/server.go`.
+   `app/main.go`.
 1. Commit your changes and run `git push origin master` to submit your solution
    to CodeCrafters. Test output will be streamed to your terminal.

solutions/go/01-at4/code/README.md

@@ -7,5 +7,5 @@ debug: false
 # Use this to change the Go version used to run your code
 # on Codecrafters.
 #
-# Available versions: go-1.22
-language_pack: go-1.22
+# Available versions: go-1.24
+language_pack: go-1.24

solutions/go/01-at4/code/app/server.go renamed to solutions/go/01-at4/code/app/main.go

@@ -8,4 +8,4 @@
 
 module github.com/codecrafters-io/http-server-starter-go
 
-go 1.22
+go 1.24.0

solutions/go/01-at4/code/codecrafters.yml

@@ -1,4 +1,4 @@
-The entry point for your HTTP server implementation is in `app/server.go`.
+The entry point for your HTTP server implementation is in `app/main.go`.
 
 Study and uncomment the relevant code: 
 

solutions/go/01-at4/code/go.mod

@@ -8,4 +8,4 @@
 
 module github.com/codecrafters-io/http-server-starter-go
 
-go 1.22
+go 1.24.0

solutions/go/01-at4/diff/app/server.go.diff renamed to solutions/go/01-at4/diff/app/main.go.diff

@@ -1,3 +1,3 @@
 attributes:
-  required_executable: go (1.19)
-  user_editable_file: app/server.go
+  required_executable: go (1.24)
+  user_editable_file: app/main.go