[CodiMD] Add a few defaults

pica-codimd/docker-compose.yml

@@ -35,12 +35,15 @@ services:
       - codimd-db
     env_file: ./secrets/codimd-db.secrets
     environment:
-      - CMD_USECDN=false
-      - CMD_DOMAIN=codimd.picasoft.net
-      - CMD_ALLOW_ANONYMOUS=true
-      - CMD_ALLOW_ANONYMOUS_EDITS=true
-      - CMD_PROTOCOL_USESSL=true
-      - CMD_CSP_ENABLE=false
+      CMD_USECDN: "false"
+      CMD_DOMAIN: codimd.picasoft.net
+      CMD_ALLOW_ANONYMOUS: "true"
+      CMD_ALLOW_ANONYMOUS_EDITS: "true"
+      CMD_ALLOW_PDF_EXPORT: "true"
+      CMD_PROTOCOL_USESSL: "true"
+      CMD_ALLOW_PDF_EXPORT: "true"
+      CMD_ALLOW_FREEURL: "true"
+      CMD_CSP_ENABLE: "false"
     networks:
       - proxy
       - codimd