Make log4j example easier to run against staging

other-examples/java/logs-in-context-log4j2/.env

@@ -0,0 +1,2 @@
+NEW_RELIC_OTLP_ENDPOINT=https://otlp.nr-data.net:4317
+NEW_RELIC_API_KEY=

other-examples/java/logs-in-context-log4j2/README.md

@@ -36,15 +36,11 @@ The following image illustrates a similar example using FluentBit:
 Next, build and run the application:
 
 ```shell
-// Build the application
-docker compose build
-./gradlew logs-in-context-log4j2:bootJar
-
 // Export your New Relic API key as an environment variable
 export NEW_RELIC_API_KEY=<INSERT-API-KEY-HERE>
 
-// Run the application and the collector with docker compose
-docker compose up
+// Build and run the application
+docker compose up --build
 ```
 
 Navigate to the app in a browser at `http://localhost:8080`. 

other-examples/java/logs-in-context-log4j2/docker-compose.yaml

@@ -7,6 +7,7 @@ services:
       # Logs are forwarded to collector using fluentd
       OTEL_LOGS_EXPORTER: none
       OTEL_EXPORTER_OTLP_ENDPOINT: 'http://collector:4317'
+      OTEL_EXPERIMENTAL_RESOURCE_DISABLED_KEYS: 'process.command_line,process.command_args'
     ports:
       - '8080:8080'
     logging:
@@ -23,6 +24,7 @@ services:
     command: ["--config=/otel-config.yaml"]
     environment:
       LOG_EXPORTER_LOG_VERBOSITY: "detailed"
+      NEW_RELIC_OTLP_ENDPOINT: ${NEW_RELIC_OTLP_ENDPOINT}
       NEW_RELIC_API_KEY: '${NEW_RELIC_API_KEY}'
     ports:
       - '4317:4317' # OTLP gRPC receiver

other-examples/java/logs-in-context-log4j2/otel-config.yaml

@@ -24,7 +24,7 @@ exporters:
   logging:
     verbosity: $LOG_EXPORTER_LOG_VERBOSITY
   otlp:
-    endpoint: https://otlp.nr-data.net:4317
+    endpoint: $NEW_RELIC_OTLP_ENDPOINT
     headers:
       "api-key": $NEW_RELIC_API_KEY
 service: