Add dockerfile for running in docker

Dockerfile

@@ -0,0 +1,27 @@
+FROM golang:1.21-alpine AS builder
+
+WORKDIR /app
+
+RUN apk add --no-cache git
+
+COPY go.mod go.sum ./
+RUN go mod download
+
+COPY . .
+RUN go build -o proxmox-cloud-image
+
+FROM ubuntu:22.04
+
+RUN apt-get update && \
+    apt-get install -y \
+    qemu-utils \
+    libguestfs-tools \
+    openssh-client \
+    ca-certificates && \
+    rm -rf /var/lib/apt/lists/*
+
+COPY --from=builder /app/proxmox-cloud-image /usr/local/bin/
+
+WORKDIR /workspace
+
+ENTRYPOINT ["proxmox-cloud-image"]

README.md

@@ -61,6 +61,43 @@ Setelah install, bisa langsung dipanggil dari mana aja:
 proxmox-cloud-image -h
 ```
 
+### Windows (WSL2):
+
+```bash
+# Install WSL2 Ubuntu
+wsl --install
+
+# Masuk ke WSL
+wsl
+
+# Install dependencies
+sudo apt update
+sudo apt install qemu-utils libguestfs-tools golang-go
+
+# Clone dan install
+git clone <repo-url>
+cd cloud-image
+sudo ./install.sh
+```
+
+### Docker (Cross-platform):
+
+Build image:
+```bash
+docker build -t proxmox-cloud-image .
+```
+
+Jalankan:
+```bash
+docker run --rm -v $(pwd)/configs:/workspace proxmox-cloud-image -config /workspace/config.yaml
+```
+
+Atau buat alias:
+```bash
+alias proxmox-cloud-image='docker run --rm -v $(pwd):/workspace proxmox-cloud-image'
+proxmox-cloud-image -h
+```
+
 ## Usage
 
 ### Menggunakan CLI flags: