Update Docker LS 0.7.3

ClearlyDefined license score is 88 as per
https://clearlydefined.io/definitions/npm/npmjs/-/dockerfile-language-server-nodejs/0.7.3
.
Start RELEASE_NOTES.md file in the git repo as Eclipse wiki is up for
retirement.

Change-Id: I03a2620e906fc6de406f3621f2f2c0df24396e8e
Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>
Reviewed-on: https://git.eclipse.org/r/c/linuxtools/org.eclipse.linuxtools/+/188867
Tested-by: Linux Tools Bot <linuxtools-bot@eclipse.org>
diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
new file mode 100644
index 0000000..ea5c73d
--- /dev/null
+++ b/RELEASE_NOTES.md
@@ -0,0 +1,11 @@
+# Eclipse Linux Tools: Release notes
+
+This page describes the noteworthy improvements provided by each release of Eclipse Linux Tools.
+
+## Next release...
+
+## 8.6.0 (under development)
+
+### Update Dockerfile LS to 0.7.3
+
+Changelog available [here](https://github.com/rcjsuen/dockerfile-language-server-nodejs/blob/master/CHANGELOG.md#073---2021-12-12).
\ No newline at end of file
diff --git a/containers/org.eclipse.linuxtools.docker.editor.ls/pom.xml b/containers/org.eclipse.linuxtools.docker.editor.ls/pom.xml
index 80c6252..347022e 100644
--- a/containers/org.eclipse.linuxtools.docker.editor.ls/pom.xml
+++ b/containers/org.eclipse.linuxtools.docker.editor.ls/pom.xml
@@ -40,7 +40,7 @@
 							<arguments>
 								<arg>install</arg>
 								<arg>--no-bin-links</arg>
-								<arg>dockerfile-language-server-nodejs@0.7.2</arg>
+								<arg>dockerfile-language-server-nodejs@0.7.3</arg>
 							</arguments>
 							<workingDirectory>language-server/</workingDirectory>
 						</configuration>