doc: Add example configuration

README.md

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+
+# Gitea
+
+## Setup on Dokku
+
+Define secrets
+
+    $(openssl rand -hex 16)
+
+Create APP
+
+    dokku apps:create code
+
+Setup Network & Domains
+
+    dokku network:create cicd_net
+    dokku network:set code attach-post-create cicd_net
+    dokku config:set --no-restart code DOKKU_LETSENCRYPT_EMAIL=username@example.com
+    
+Setup Storage
+
+    dokku storage:mount /etc/localtime:/etc/localtime:ro
+    dokku storage:mount /etc/timezone:/etc/timezone:ro
+    dokku storage:mount /home/data/code.gitea/data:/data
+    dokku storage:mount /home/git/.ssh/:/data/git/.ssh
+
+Setup Configuration
+
+    dokku config:set code
+    DATABASE_URL:             mysql://xxxxx
+    REDIS_URL:                redis://xxxxx
+    USER_GID:                 1002
+    USER_UID:                 1002
+
+
+Deploy
+
+    git remote add dokku dokku@example.com:cicd
+    git push
+
+## Create Wrapper
+
+adduser --disabled-password git
+adduser git docker
+
+Create ssh key for git user
+
+    ssh-keygen -t rsa -f /home/git/.ssh/id_rsa -C "Gitea Host Key"
+    chmod 600 /home/git/.ssh/id_rsa
+
+Create `/usr/local/bin/gitea`
+
+    GITEA_CID=code.web.1
+    # GITEA_IP="$(docker inspect "$GITEA_CID" -f '{{ (index (index .NetworkSettings.Ports "80/tcp") 0).HostPort }}')"
+    GITEA_IP="$(docker inspect "$GITEA_CID"  -f '{{ .NetworkSettings.IPAddress }}' 2>/dev/null )"
+
+    ssh -T -p 22 -o StrictHostKeyChecking=no git@$GITEA_IP "SSH_ORIGINAL_COMMAND=\"$SSH_ORIGINAL_COMMAND\" $0 $@"
+