diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..b3167be
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,3 @@
+IMAP_HOST=mail.example.com
+SMTP_HOST=mail.example.com
+IMAP_SSL=true
\ No newline at end of file
diff --git a/.github/workflows/publish-docker-image.yml b/.github/workflows/publish-docker-image.yml
new file mode 100644
index 0000000..69b5f61
--- /dev/null
+++ b/.github/workflows/publish-docker-image.yml
@@ -0,0 +1,42 @@
+name: Create and publish a Docker image
+
+on:
+  push:
+    tags:
+      - v*
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@9ec57ed1fcdbf14dcef7dfbe97b2010124a938b7
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@f2a1d5e99d037542a71f64918e516c093c6f3fc4
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..4511e7f
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+.DS_Store
+docker-compose.override.yml
+.env
+.env.*
+!.env.example
\ No newline at end of file
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..f92f152
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,23 @@
+FROM caddy:2.8.4-alpine AS caddy
+
+FROM php:8.3-fpm-alpine
+
+RUN apk update && apk add supervisor
+
+COPY --from=caddy /usr/bin/caddy /usr/bin/caddy
+
+# Configure supervisor
+RUN mkdir -p /etc/supervisor.d/
+COPY ./docker/supervisord.ini /etc/supervisor.d/supervisord.ini
+
+# Configure Caddy web server
+COPY ./docker/Caddyfile /etc/caddy/Caddyfile
+
+# Configure PHP-FPM
+RUN mv /usr/local/etc/php/php.ini-production /usr/local/etc/php/php.ini
+
+WORKDIR /src
+COPY ./src /var/www/html
+
+EXPOSE 80
+CMD ["/usr/bin/supervisord", "-c", "/etc/supervisor.d/supervisord.ini"]
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..8ca237f
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+# Autodiscover
+
+IMAP/SMTP autodiscover for email clients.
diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 0000000..0f5b0a0
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,7 @@
+services:
+  autodiscover:
+    build: .
+    ports:
+      - "8000:80"
+    env_file:
+      - .env
\ No newline at end of file
diff --git a/docker/Caddyfile b/docker/Caddyfile
new file mode 100644
index 0000000..d6c723e
--- /dev/null
+++ b/docker/Caddyfile
@@ -0,0 +1,4 @@
+:80 {
+	root * /var/www/html
+	php_fastcgi localhost:9000
+}
\ No newline at end of file
diff --git a/docker/supervisord.ini b/docker/supervisord.ini
new file mode 100644
index 0000000..afebf9b
--- /dev/null
+++ b/docker/supervisord.ini
@@ -0,0 +1,16 @@
+[supervisord]
+nodaemon=true
+
+[program:caddy]
+  command=/usr/bin/caddy run --config /etc/caddy/Caddyfile --adapter caddyfile
+  stdout_logfile=/dev/stdout
+  stdout_logfile_maxbytes=0
+  stderr_logfile=/dev/stderr
+  stderr_logfile_maxbytes=0
+
+[program:php-fpm]
+  command=php-fpm
+  stdout_logfile=/dev/stdout
+  stdout_logfile_maxbytes=0
+  stderr_logfile=/dev/stderr
+  stderr_logfile_maxbytes=0
\ No newline at end of file
diff --git a/src/index.php b/src/index.php
new file mode 100644
index 0000000..86103b6
--- /dev/null
+++ b/src/index.php
@@ -0,0 +1,40 @@
+<?php
+
+header('Content-Type: application/xml');
+$raw = file_get_contents('php://input');
+$imap_server = getenv('IMAP_HOST');
+$imap_ssl = getenv('IMAP_SSL');
+$smtp_server = getenv('SMTP_HOST');
+
+$matches = array();
+preg_match('/<EMailAddress>(.*)<\/EMailAddress>/', $raw, $matches);
+?>
+<?xml version="1.0" encoding="utf-8" ?>
+<Autodiscover xmlns="http://schemas.microsoft.com/exchange/autodiscover/responseschema/2006">
+  <Response xmlns="http://schemas.microsoft.com/exchange/autodiscover/outlook/responseschema/2006a">
+    <Account>
+      <AccountType>email</AccountType>
+      <Action>settings</Action>
+      <Protocol>
+        <Type>IMAP</Type>
+        <Server><?= $imap_server ?></Server>
+        <Port>993</Port>
+        <DomainRequired>off</DomainRequired><?= (empty($matches)) ? "\n" : PHP_EOL . "<LoginName>" . $matches[1] . "</LoginName>" ?>
+        <SPA>on</SPA>
+        <SSL><?= $imap_ssl == true ? "on" : "off" ?></SSL>
+        <AuthRequired>on</AuthRequired>
+      </Protocol>
+      <Protocol>
+        <Type>SMTP</Type>
+        <Server><?= $smtp_server ?></Server>
+        <Port>587</Port>
+        <DomainRequired>off</DomainRequired><?= (empty($matches)) ? "\n" : PHP_EOL . "<LoginName>" . $matches[1] . "</LoginName>" ?>
+        <SPA>off</SPA>
+        <Encryption>off</Encryption>
+        <AuthRequired>on</AuthRequired>
+        <UsePOPAuth>off</UsePOPAuth>
+        <SMTPLast>off</SMTPLast>
+      </Protocol>
+    </Account>
+  </Response>
+</Autodiscover>