Added build instructions in README & gitignored elements

.gitignore

@@ -14,10 +14,18 @@
 # Output of the go coverage tool, specifically when used with LiteIDE
 *.out
 
-# Dependency directories (remove the comment below to include it)
-# vendor/
+# Dependency directories
+vendor/
 
 # Go workspace file
 go.work
 
-.idea/
+# Jetbrains IDEs
+.idea/
+
+# Generated binary
+duck-gen
+
+# AI tools
+.claude/
+CLAUDE.md

README.md

@@ -17,3 +17,26 @@ embargo-frisk-rack@duck.com
 ## Installation 
 
 Download pre-built binaries from the [Releases](https://github.com/chowder/duck-gen/releases) page
+
+### Building from Source
+
+1. **Install Go** (requires Go 1.23.2 or later):
+   - Download from https://go.dev/dl/
+
+2. **Clone and build**:
+   ```bash
+   git clone https://github.com/chowder/duck-gen.git
+   cd duck-gen
+   go mod vendor
+   go build -mod=vendor
+   ```
+
+   This will create a `duck-gen` binary in the current directory.
+
+3. **Install to your PATH** (optional):
+   ```bash
+   go install
+   ```
+   This installs the binary to `$GOPATH/bin` or `$HOME/go/bin` (add to your PATH if needed).
+
+   > Alternatively, you can move the binary to anywhere you like and put an alias to it in your `.bash_aliases`, `.bashrc`, `.zsh_aliases` or `.zshrc`.