external logback config (agentlang-ai#833)

README.md

@@ -27,3 +27,7 @@ If the command fails, install the dependency [`fractl-lein-template`](https://gi
 Note: For now, use an absolute path for `<target_dir>`. The issue to handle relative paths is [here](https://github.com/fractl-io/fractl/issues/692).  
 This will create a the `<target_dir>/fractl-<version>` and copy the fractl uberjar, config.edn
 and the `fractl` command-line tool there.
+
+# Setting logging properties
+
+export JAVA_OPTS=-Dlogback.configurationFile=/path/to/logback.xml

src/fractl/lang/tools/build.clj

@@ -239,7 +239,7 @@
             spec (update-project-spec model (rd "project.clj"))
             log-config (make-log-config model-name (model-version model))]
         (wr "project.clj" spec)
-        (wr "resources/logback.xml" log-config :spit)
+        (wr "logback.xml" log-config :spit)
         (let [cmps (mapv (partial copy-component wr model-name) components)]
           (write-model-clj wr model-name cmps model)
           (write-config-edn model-root wr)