Rework docker setup

docker/docker-compose/docspell.conf

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+# This is the configuration file for docspell. It contains two main
+# namespaces: docspell.server and docspell.joex. Each provide the
+# config for the respective component.
+#
+# They can be moved to different files, if necessary. For this example
+# though, both components are configured in this single file.
+#
+# Below are only some settings that differ from the default. Please
+# see https://docspell.org/docs/configure/#default-config for all
+# options and their documentation. This page provides more
+# information about the important config options.
+#
+# Note: this docker-compose setup is an example to get started. It
+# sets up one rest-server, one joex, a postgres database and a solr –
+# all on the same machine.
+
+# Define settings that are used in multiple places:
+db_url="jdbc:postgresql://db:5432/dbname"
+db_user="dbuser"
+db_pass="dbpass"
+solr_url="http://docspell-solr:8983/docspell"
+
+
+# This configures the restserver
+docspell.server {
+  base-url = "http://localhost:7880"
+  bind {
+    address = "0.0.0.0"
+  }
+  integration-endpoint {
+    enabled = true
+    http-header {
+      enabled = true
+      header-value = ${?DOCSPELL_HEADER_VALUE}
+    }
+  }
+  # Configuration of the full-text search engine.
+  full-text-search {
+    enabled = true
+    solr = {
+      url = ${solr_url}
+    }
+  }
+  backend {
+    jdbc {
+      url = ${db_url}
+      user = ${db_user}
+      password = ${db_pass}
+    }
+  }
+}
+
+
+# This configures joex
+#
+# Note to joex: It is currently setup for one instance. Should you
+# want to scale joex instance up (maybe to help processing a batch of
+# files), there are two options:
+#
+# - look at https://github.com/eikek/docspell/pull/552 to elastically
+#   start and stop joex instances via docker-compose
+# - set pool-size to some higher number; this requires to restart joex
+#
+docspell.joex {
+  base-url = "http://docspell-joex:7878"
+  bind {
+    address = "0.0.0.0"
+  }
+  jdbc {
+    url = ${db_url}
+    user = ${db_user}
+    password = ${db_pass}
+  }
+  full-text-search {
+    enabled = true
+    solr = {
+      url = ${solr_url}
+    }
+  }
+  scheduler {
+    pool-size = 1
+  }
+}