Fix docker build

Dockerfile

@@ -2,18 +2,21 @@
 # The Dockerfile for the TerrabaseDB server tdb
 #
 
-FROM dockerfile/ubuntu
-
+FROM ubuntu:20.04
+ENV TZ=america/central
 RUN \
-    cd /tmp &&
-    apt install git
-    curl https://sh.rustup.rs -sSf | sh -s -- -y
-    git clone https://github.com/terrabasedb/terrabase.git
-    cd terrabase
-    git fetch --tags
-    lt=$(git describe --tags `git rev-list --tags --max-count=1`)
-    git checkout $lt
-    cargo build --release -p tdb
+    ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ >/etc/timezone && \
+    apt-get update && apt-get install git curl -y && \
+    cd /tmp && \
+    curl https://sh.rustup.rs -sSf | sh -s -- -y && \
+    git clone https://github.com/terrabasedb/terrabase.git && \
+    cd terrabase && \
+    git fetch --tags && \
+    lt=$(git describe --tags $(git rev-list --tags --max-count=1)) && \
+    git checkout $lt && \
+    cargo build --release -p tdb && \
+    apt-get remove rustc git curl -y && \
+    apt-get autoremove -y && \
     cp -f target/release/tdb /usr/local/bin
 
 VOLUME ["/data"]
@@ -22,4 +25,6 @@ WORKDIR /data
 
 CMD ["tdb"]
 
-EXPOSE 2003
+EXPOSE 2003
+
+ARG DEBIAN_FRONTEND=noninteractive