diff --git a/Dockerfile b/Dockerfile
index 675409b..11428c0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,10 +1,23 @@
-from nginx:latest
-MAINTAINER USGS LCMAP http://eros.usgs.gov
+FROM centos:centos7
 
-RUN mkdir /usr/share/man/man1
-RUN apt-get update
-RUN apt-get install default-jdk curl vim -y
+RUN yum update -y
 
+## Install Java
+RUN yum install -y java-1.8.0-openjdk.x86_64 java-1.8.0-openjdk-devel.x86_64  java-1.8.0-openjdk-headless.x86_64
+
+## Install NGINX
+ENV nginxversion="1.16.1-1" \
+    os="centos" \
+    osversion="7" \
+    elversion="7"
+
+RUN yum install -y wget openssl sed &&\
+    yum -y autoremove &&\
+    yum clean all &&\
+    wget http://nginx.org/packages/$os/$osversion/x86_64/RPMS/nginx-$nginxversion.el$elversion.ngx.x86_64.rpm &&\
+    rpm -iv nginx-$nginxversion.el$elversion.ngx.x86_64.rpm
+
+## Install Mastodon
 COPY resources/public/index.html /usr/share/nginx/html/index.html
 COPY resources/public/js/compiled/mastodon_min.js /usr/share/nginx/html/js/compiled/mastodon_min.js
 COPY resources/public/js/jquery.min.js /usr/share/nginx/html/js/jquery.min.js
@@ -17,4 +30,7 @@ COPY project.clj /project.clj
 COPY target/lcmap-mastodon-*-standalone.jar /
 
 RUN mkdir /data
+
+# Run!
 CMD /startup.sh
+
diff --git a/bin/build b/bin/build
index fb79a21..9e3d96a 100755
--- a/bin/build
+++ b/bin/build
@@ -14,7 +14,7 @@ BRANCH="${TRAVIS_BRANCH:-`git rev-parse --abbrev-ref HEAD | tr / -`}"
 echo Branch: $BRANCH
 
 # ...same for the commit.
-COMMIT="${TRAVIS_COMMIT:-`git rev-parse HEAD`}"
+COMMIT=`git rev-parse --short HEAD`
 echo Commit: $COMMIT
 
 # Version is extracted from project.clj so that a meaningful tag can
@@ -32,22 +32,20 @@ else
     exit 1
 fi
 
+# Including the short commit SHA ensures uniquely identified builds
+# as its possible for users to commit changes without incrementing
+# version numbers, resulting new builds with the same tag
+BRANCH_TAG=$REPO:$BRANCH-$VERSION-$COMMIT
+echo "BRANCH_TAG: ${BRANCH_TAG}"
+
 # Travis will build topic branches, but Docker images should not be
 # built for each one because this would result in a *lot* of images
 # during periods of active development.
 if [ "$BRANCH" == "master" ] || [ "$BRANCH" == "develop" ] ; then
 
-    # Using the commit SHA will ensure that built images persist on
-    # Docker Hub unless explicitly removed. A more meaningful tag
-    # is also created using the <branch>-<version> but that can be
-    # superseded by subsequent builds.
-    COMMIT_TAG=$REPO:$COMMIT
-    BRANCH_TAG=$REPO:$BRANCH-$VERSION
-
     echo "Building Docker image for $COMMIT_TAG ($BRANCH_TAG)"
     lein uberjar
-    docker build -f Dockerfile -t $COMMIT_TAG .
-    docker tag $COMMIT_TAG $BRANCH_TAG
+    docker build -f Dockerfile -t $BRANCH_TAG .
     docker push $REPO
     echo "Building Docker image ... done"
 
diff --git a/default.conf b/default.conf
index 294325f..3154b61 100644
--- a/default.conf
+++ b/default.conf
@@ -1,6 +1,7 @@
 server {
     listen       80;
     server_name  localhost;
+    server_tokens off;
 
     location / {
         root   /usr/share/nginx/html;
diff --git a/project.clj b/project.clj
index 59e1d6f..f2f5078 100644
--- a/project.clj
+++ b/project.clj
@@ -1,4 +1,4 @@
-(defproject lcmap-mastodon "4.2.4"
+(defproject lcmap-mastodon "4.3.0"
   :description "Functions for LCMAP data curation"
   :url "https://eros.usgs.gov"
   :license {:name "Unlicense"