removed coltrane gem

minimal/Dockerfile

@@ -17,8 +17,7 @@ RUN echo "$USER ALL=(ALL) NOPASSWD:ALL" > /etc/sudoers.d/99-$USER && chmod 0440
 
 # Pre-requisites
 RUN apt-get update && apt-get install -y -V --no-install-recommends \
-      apt-transport-https \
-      gnupg lsb-release apt-utils locate \
+      apt-transport-https gnupg lsb-release apt-utils \
       ca-certificates \
       curl \
       cmake \
@@ -55,7 +54,6 @@ RUN apt-get update && apt-get install -y -V --no-install-recommends \
   apt-get clean && rm -rf /var/lib/apt/lists/*
 
 # Copy Ruby 3.1.3 from rubylang/ruby
-
 COPY --from=rubylang/ruby:3.1.3-focal \
   /usr/local/bin/bundle \
   /usr/local/bin/bundler \

minimal/Gemfile

@@ -13,7 +13,6 @@ gem 'bcrypt_pbkdf'
 gem 'bundler'
 gem 'childprocess'
 gem 'colorize'
-gem 'coltrane'
 gem 'debug'
 gem 'dotenv'
 gem 'drydock'

minimal/README.md

@@ -16,7 +16,7 @@ pry
 
 ## Components in this image
 
-- Based on buildpack-deps:xenial
+- Based on jupyter/scipy-notebook
 - Ruby 3.1.3
     - Almost same as docker-library's ruby image
 - Python 3.10.1
@@ -30,12 +30,3 @@ pry
     scikit-learn, scikit-image, sympy, gensim, nltk, cython, statsmodel,
     patsy, cloudpickle, dill, numba, xray, pyarrow, tensorflow, keras,
     chainer, xgboost
-
-## Basic Usage
-
-This image does not run Jupyter Notebook in default.
-The following command runs bash shell on root user.
-
-```
-docker run -p 8888:8888 -v ./.env:/home/joyven/.env b08x/minimal:latest
-```