smtprelay: generate self signed cert

smtprelay/Dockerfile

@@ -1,4 +1,5 @@
 FROM alpine:edge
-RUN apk --update --no-cache add opensmtpd && \
-    install -d -m 0711 -v /var/spool/smtpd
+RUN apk --update --no-cache add opensmtpd openssl && \
+    install -d -m 0711 -v /var/spool/smtpd && \
+    openssl req -newkey rsa:4096 -nodes -keyout /etc/ssl/serverkey.pem -x509 -days 365 -subj "/CN=smtprelay.codehal.de" -out /etc/ssl/servercert.pem
 ENTRYPOINT smtpd -d

smtprelay/smtpd/cert.pem

@@ -1,33 +0,0 @@
------BEGIN CERTIFICATE-----
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-s59sUAWupASpxRNxB6MdgJAnAe6uz1k=
------END CERTIFICATE-----

smtprelay/smtpd/key.pem

@@ -1,52 +0,0 @@
------BEGIN PRIVATE KEY-----
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-bXrg+CeLXkHyZ28y2ulOO2pMvSQso08=
------END PRIVATE KEY-----

smtprelay/smtpd/smtpd.conf

@@ -1,5 +1,5 @@
-pki "server" cert "/etc/smtpd/cert.pem"
-pki "server" key  "/etc/smtpd/key.pem"
+pki "server" cert "/etc/ssl/servercert.pem"
+pki "server" key  "/etc/ssl/serverkey.pem"
 
 table creds file:/etc/smtpd/creds