update docs and remove docker from the pom

DEVELOPING.md

@@ -601,18 +601,8 @@ a non-root user.
 
 ### Build Emissary Docker Image
 
-Maven can be used to create the docker image. There is a profile that was created to run the docker image build that, by default,
-has been turned off. We'll need to add the docker profile, along with the dist profile, to trigger an assembly. From the
-project root, run the following maven command:
-
-```
-mvn clean install -Pdist,docker
-```
-
-Alternatively, we can use Docker directly. First run a full maven build and then run the ```docker build``` command:
-
+We can use Docker directly to build Emissary:
 ```
-mvn clean install -Pdist
 docker build -f contrib/docker/Dockerfile . -t emissary
 ```
 

contrib/docker/Dockerfile

@@ -14,7 +14,6 @@ ENV PROJECT_BASE=/opt/emissary
 RUN rpm --import https://yum.corretto.aws/corretto.key \
      && curl -L -o /etc/yum.repos.d/corretto.repo https://yum.corretto.aws/corretto.repo \
      && yum install -y java-${java_version}-amazon-corretto-devel \
-     && yum update -y \
      && yum install -y which \
      && groupadd -g ${gid} ${group} \
      && useradd -u ${uid} -g ${group} -m -s /bin/bash ${user} \

contrib/docker/Dockerfile.ubi8

@@ -14,7 +14,6 @@ ENV PROJECT_BASE=/opt/emissary
 RUN rpm --import https://yum.corretto.aws/corretto.key \
      && curl -L -o /etc/yum.repos.d/corretto.repo https://yum.corretto.aws/corretto.repo \
      && dnf install -y java-${java_version}-amazon-corretto-devel \
-     && dnf update -y \
      && dnf install -y langpacks-en glibc-all-langpacks \
      && groupadd -g ${gid} ${group} \
      && useradd -u ${uid} -g ${group} -m -s /bin/sh ${user} \

pom.xml

@@ -1574,41 +1574,6 @@
         <directory>${project.basedir}/target-idea</directory>
       </build>
     </profile>
-    <profile>
-      <id>docker</id>
-      <build>
-        <plugins>
-          <plugin>
-            <groupId>org.codehaus.mojo</groupId>
-            <artifactId>exec-maven-plugin</artifactId>
-            <version>3.1.0</version>
-            <executions>
-              <execution>
-                <id>docker-build</id>
-                <goals>
-                  <goal>exec</goal>
-                </goals>
-                <phase>install</phase>
-                <configuration>
-                  <executable>docker</executable>
-                  <workingDirectory>${project.basedir}</workingDirectory>
-                  <arguments>
-                    <argument>build</argument>
-                    <argument>-f</argument>
-                    <argument>contrib/docker/Dockerfile</argument>
-                    <argument>-t</argument>
-                    <argument>${project.artifactId}:${project.version}</argument>
-                    <argument>-t</argument>
-                    <argument>${project.artifactId}:latest</argument>
-                    <argument>.</argument>
-                  </arguments>
-                </configuration>
-              </execution>
-            </executions>
-          </plugin>
-        </plugins>
-      </build>
-    </profile>
     <profile>
       <id>jdk-release-flag</id>
       <activation>