Add recipe for New Relic

Fixes #102

docker-compose-services/newrelic/README.md

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+# New Relic
+
+This recipe adds a New Relic daemon service and PHP agent to the `web` container.
+
+Once configured it will begin reporting data to New Relic. Your DDEV project name will be the app name reported in your New Relic APM list.
+
+## Configuration
+
+There are two configuration items in `docker-compose.newrelic.yaml`.
+
+* `NEW_RELIC_LICENSE_KEY`: You must specify your license key.
+* `NEW_RELIC_AGENT_VERSION`: Specify the New Relic agent version.

docker-compose-services/newrelic/docker-compose.newrelic.yaml

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+---
+# Adds New Relic support for performance profiling.
+version: '3.6'
+services:
+  newrelic:
+    image: newrelic/php-daemon
+    container_name: ddev-${DDEV_SITENAME}-newrelic
+    ports: ['31339']
+    labels:
+      com.ddev.site-name: ${DDEV_SITENAME}
+      com.ddev.approot: $DDEV_APPROOT
+
+  web:
+    build:
+      args:
+        NEW_RELIC_AGENT_VERSION: "9.2.0.247"
+        NEW_RELIC_LICENSE_KEY: ""
+    links:
+      - newrelic

docker-compose-services/newrelic/php/newrelic-ddev.ini

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+newrelic.distributed_tracing_enabled=true
+newrelic.daemon.address="newrelic:31339"

docker-compose-services/newrelic/web-build/Dockerfile

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+ARG BASE_IMAGE
+FROM $BASE_IMAGE
+
+# Install New Relic
+# @see https://docs.newrelic.com/docs/agents/php-agent/advanced-installation/docker-other-container-environments-install-php-agent
+ARG NEW_RELIC_AGENT_VERSION
+ARG NEW_RELIC_LICENSE_KEY
+
+RUN curl -L https://download.newrelic.com/php_agent/archive/${NEW_RELIC_AGENT_VERSION}/newrelic-php5-${NEW_RELIC_AGENT_VERSION}-linux.tar.gz | tar -C /tmp -zx \
+    && export NR_INSTALL_USE_CP_NOT_LN=1 \
+    && export NR_INSTALL_SILENT=1 \
+    && /tmp/newrelic-php5-${NEW_RELIC_AGENT_VERSION}-linux/newrelic-install install \
+    && rm -rf /tmp/newrelic-php5-* /tmp/nrinstall*
+
+RUN sed -i -e "s/REPLACE_WITH_REAL_KEY/${NEW_RELIC_LICENSE_KEY}/" \
+    -e "s/newrelic.appname[[:space:]]=[[:space:]].*/newrelic.appname=\"${NEW_RELIC_APPNAME}\"/" \
+    /etc/php/${PHP_DEFAULT_VERSION}/fpm/conf.d/newrelic.ini
+RUN sed -i -e "s/REPLACE_WITH_REAL_KEY/${NEW_RELIC_LICENSE_KEY}/" \
+    -e "s/newrelic.appname[[:space:]]=[[:space:]].*/newrelic.appname=\"${NEW_RELIC_APPNAME}\"/" \
+    /etc/php/${PHP_DEFAULT_VERSION}/cli/conf.d/newrelic.ini