minimal dovecot on alpine 3.10

Dockerfile

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+FROM alpine:3.10
+
+RUN apk add --no-cache dovecot
+
+CMD ["dovecot", "-F"] 

README.md

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+# dovecot ✉️ 🐳
+
+Dovecot: IMAP, POP3 & SASL Auth Server
+
+https://www.dovecot.org/
+
+## Usage
+
+```sh
+docker run --name dovecot \
+    -p ... \
+    -v $PWD/dovecot.conf:/etc/dovecot/dovecot.conf:ro \
+    fphammerle/dovecot
+```

docker-compose.yml

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+version: '2'
+
+services:
+  dovecot:
+    build: .
+    image: fphammerle/dovecot
+    security_opt: [no-new-privileges]
+    restart: unless-stopped
+
+# https://docs.docker.com/compose/compose-file/compose-file-v2/